The latest incident happened Monday at about 9:45 p.m. near Clinton. The woman told police that a dark colored sedan with a revolving blue light on the dash pulled her over on Yarnell Road off East Wolf Road. The man approached her car and asked for her driver's license. He then pulled out a knife, and she immediately drove away and called 911.

Deputies said the man is in his mid-to-late 20s or mid-30s, is 6 feet tall, weighs about 200 pounds, is clean shaven, has short dark brown hair, and has a muscular build. The woman told officials the man also spoke with a soft voice and was well-dressed.

The police impersonator in Monday's incident wasn't wearing a uniform but had a badge on his belt. His car may have been an older model Chevrolet Caprice with a chrome grille.

The incident earlier this month happened on Laurel Road near Clinton on the night of Aug. 4. In the first incident, the man pulled a woman over, asked to see her driver's licence, and searched her car. The woman in that incident described the man as "nice, not rude and straight to the point."

The sheriff's office is investigating both incidents, but haven't located the vehicles or found any suspects. Anyone with information on either cases are asked to contact Sgt. Jeff Davis with the Criminal Investigations Unit at 865-457-6255 at ext. 1141 or the communications center at 865-457-2414.

Deputies are conducting extra patrols in that area. But the Anderson County Sheriff's Department wants to remind motorists that if they're unsure if an actual law enforcement officer is pulling them over, they should turn on their hazard flashers, call 911, and slowly drive to a well-lit area, like a business or store before stopping.